In order to solve the problem of huge time cost in the generating process of 3Dterrain data, this paper presents a HPC(High Performance Computing)method based on GPGPU and computer cluster, which can integrate the CPUs and GPUs of the computer cluster together to provide huge computing ability. When the HPC method is used to generate 3Dterrain data, the terrain is divided into pieces with two levels of details first, and then assigned to GPU pipelines. In this way, the computing throughput is greatly improved and plenty of time can be saved.